Method getMouseButton

src/app/ui/editor/tool_loop_impl.cpp:211–211

  }
  const render::Zoom& zoom() override { return m_editor->zoom(); }
  ToolLoop::Button getMouseButton() override { return m_button; }
  doc::color_t getFgColor() override { return m_fgColor; }
  doc::color_t getBgColor() override { return m_bgColor; }
  doc::color_t getPrimaryColor() override { return m_primaryColor; }